Air Around Us

Air around us Worksheet-4

Multiple-Choice Question:

31. What are the possible sources of groundwater contamination?

(a) Septic tanks                                (b) Landfills

(c) Animal wastes                            (d) All of these

32. Wearing down of soil on land by the action of water, wind, or ice called?

(a) Melt down     (b) Erasing           (c) Erosion           (d) Conservation

Air around us Worksheet-5

Multiple-Choice Question:

41. During burning, __________ is produced.

(a) oxygen                                        (b) carbon dioxide                

(c) nitrogen                                      (d) None of these

Air around us Worksheet-6

True/False: